Valve for the gas-burners of furnaces



E. W. VEST. VALVE FOR THE GAS BURNEBS 0F FURNACES, STOVES, AND RANGES.APPLICATION FILED APR. 8. mm

1,325,457; Patented Dec. 16,1919.

40 7 z; 9 21 28 W 2 M" 3 I'll/inn EUGENE V. VEST, OF ST. LOUIS,MISSOURI.

VALVE FOR THE GAS-BURNEBJS OF FURNACES, STOVES, AND RANGES.

Specification of Letters Patent.

Patented Dec. 16, 1919.

Application filed April 8, 1918. Serial No. 227,248.

To all whom it may concern.-

Be it known that I, EUGENE W. VEsr, a citizen of the United States,residing at St. Louis, in the State of Missouri, have invented certa-innew and useful Improve- 'ments in Valves for the Gas-Burners ofFurnaces, Stoves, and Ranges, of which the following is a specificationcontaining a full, clear, and exact description, reference being had tothe accompanying drawings, forming a part hereof.

My invention relates to an improved valve for the burners of gasfurnaces, gas stoves and gas ranges, and it consists in the novelarrangement and construction of parts hereinafter fully described andparticularly claimed.

The object of my invention is to provide an improved gas-valveconstruction wherein the parts may be quickly disassembled for thepurpose of changing the discharge-tip of the injecting gas-nozzle,whenever desired, to change the size of said tip accord ing to theservice required.

A further object of my invention is to provide im roved means wherebythe dischargeori cc of the discharge-tip cannot be completely closed, sothat the gas can be turned down but cannot be completely turned off atsaid tip, and enable the burner to operate when turned down to the limitupon a very small quantity of gas, without the trouble of relighting.

A further object of my invention is to provide a suitable gas-valve, aBunsen burner, and an air-throat for said burner, all in a singlecasting, a suitable valve for controlling the entrance of airto saidthroat, a cam on the stem of said gas-valve, and a mechanical connectionbetween said cam and the said air controlling valve; whereby the turningup or down of the said gasvalve stem will simultaneously regulate thesupply of air, to produce the Bunsen flame required for the mostefiicient and economical consumption of gas.

In the drawings, a

Figure 1 is a vertical section of portions of the lire-box of a furnaceor stove, or of a range, having my invention applied thereto.

Fig. 2 is a detail front elevation of the connections between thegas-valve stem, the air-valve and the draft-damper at the top of therange or other apparatus to which the invention may be applied.

Fig. 3 is a detail section through the gasvalve casting, taken on theline 3-3 of Fig. 4.

Fig. 4 is a Vertical section of the outer portion of the gas-valve, and

Fig. 5 is a detail section of the air-valve shank adjusting-means.

In the present illustration ofmy invention I have shown but a singlesmall combustion-chamber having .a base-section 1 provided with anaperture 2 in which the burner casting is located, to discharge amixture of gas and air from the central discharge-pipe 3 of saidcasting, and to simultaneously discharge cold air from the concentricdischarge-pipe 4: ofsaid casting upwardly into the said combustion-charmher; as is shown and described more particularly in my two companionapplications, of even date herewith, entitled respectively gas-burningsystem for furnaces, heatingstoves, ranges, 820., Serial No. 227,245,and gas-burners for furnaces, stoves and ranges, Serial No. 2272M.

But it should be understood that my in.- vention is applicable to anyshape or size of combustion-chamber or fire-box.

The numeral 5 designates the top of the range, or the top of afire-chamber connected to the fire-box or combustion-chamber,

no matter what form of apparatus my invention is located in, whether itbe a range, furnace or stove.

The said burner casting is supported by suitable-means, such as apedestal 6 resting upon the bottom of the ash-box or ash-pit 7, whileits upper end carries a common T S into which is threaded a tubularshank 9 formed integral with the said casting, and the lower end ofwhich shank is a continuationof the said gas and air dischargepipe 3,and forms a dirt-receptacle 10, into which dirt and dust from the saiddischargepipe falls, to be removed by a suitable small common scraperinserted into a horizontal clean-out pipe 11 having a detach able cap 12at its outer end'and located for convenient access.

Said combustion-chamber is composed of sections or blocks of fire-clay,or of other highly refractory material, the numeral 13 designating twoopposite vertical blocks, which support the top-section 15 of saidchamber.

The flame and hot gases fromsaid discharge-pipes 3 and 4: are dischargedupwardly into and through the said combus-.

tion-chamber, which I now designate by the numeral 14, and said flamewill impinge upon the underside of the top-section 15 of the burnercovering, and then pass up around the opposite edges of saidtop-section, on their way to some other portion of the range, furnace orstove.

The mixing-tube 16 is threaded into a neck or boss 17 formed integralwith the front vertical wall of said burner casting, and the interior ofsaid tube communicates with the said central discharge-pipe 3 by way ofa lateral duct or passage 18, and said mixing-tube and the valve thereofmay be of any common approved form, although I prefer the improved formherein shown, and described as follows:

The gas-valve casting is formed with a horizontal portion 19 to whichthe outer end of the said mixing-tube is connected by a common coupling20, and an air-throat 21 is formed integral with said casting, andextends from the upper side thereof, upwardly for a short distance, andthen out wardly, in substantially the form of the letter L inverted.

Said air-throat 21 has its interior in communication with the interiorof said mixing-tube 16 by way of the said horizontal portion 19.

A common reticulated cone or strainer 22 is fixed in said air-throat 21,to strain the air, in the usual manner.

An important feature of my invention is the detachable andinterchangeable tip 23 at the inner end of the gas-throat 24 of saidgas-valve casting, the outer end of said tip being threaded into thethreaded inner end of said gasthroat, and provided with a centraldischarge-aperture 25 which is of somewhat greater diameter than thediameter of the valve 26 which cooperates with it.

Projecting from the front of the gasvalve casting in axial alinementwith the mixing-tube and its neck 17, is a tubular or hollow boss 27,which is internally threaded to receive an externally-threaded tubularplug 28,'which can be quickly detached from said position wheneveraccess is to be had to the interior of said gas-valve casting.

Said plug 28 carries th said gas-throat 24, which is detachabletherewith.

A very quick opening and closing of the gas-valve 26 is secured by meansof a screw thread 29 on the gas-valve stem engaging correspondingthreads 30 on the interior of a bore formed in the said plug 28, ametallic washer 31, perforated for the passage therethrough of the saidstem, closing the end of said bore, to receive the pressure of thestufing-box gland 32 upon the packing 33, said gland being threaded intothe enlarged outer nd of said bore.

The numeral 34 designates the service pipe, through which gas is to besupplied to the gas-valve casting, by way of a common shut-off cock 35,common union 36, and the nipple 37, which latter is threaded into thelower partof the said hollow boss 27 of said casting, and communicateswith a vertical passage 38 formed in said boss.

The gas passes from the said vertical passage 38 of the said boss 27into an annular gas-passage 39 formed in the outer tapered periphery 40of said plug 28, whence the gas flows inwardly to the gas-throat 24through a series of radial short ducts 41. (See Fig. 3.)

A simultaneous regulation of the en trance of air to the said air throat21 of the gas-valve casting, the passage of gas through thedischarge-aperture 25 to the burner, and the damper 42 which retards thehot expanded gases against their exit from the fire-chamber beneath thesaid top 5 of the range, furnace or stove, is secured (in the presentinstance) by means of the following connections, to-wit:

A slide-valve 43, having an opening 44 through it, is mounted to slidevertically in dove-tailed guides 45 carried by the front of saidair-throat, to more or less close the entrance to the latter, and permitmore or less air to pass through the said opening 44 into the saidthroat, as the said valve is moved up or down in its guides by means ofa suitable connection with the gas-valve stem 46.

In the present illustration of this part of my invention I have provideda cam, having a suitable throw, and fixed upon the said stem 46 at apoint between the said stufiingboX gland 32 and the stem-handle 47, theprojecting lip 48 of said cam being embraced by a U-shaped bearing 49 atthe lower end of said valve 43, and there being a shank 50 on the upperend of said valve pivotally connected at 51 to one arm of a bell-crank52 which is pivoted at 53 to the side wall of the range, furnace orstove, and has its other arm provided with a laterallvprojecting pin 54for detachable engagement with any one of a series of notches 55 formedin a horizontal damper rod 56.

The said damper-rod 56 is provided at one end with a common handle 57,and has its opposite end pivoted at 58 to the common crank or lever 59of the said damper 42; whereby, when the said gas-valve stem is turnedby means of its said handle 47 the said cam will turn with it and causea corresponding movement of the said slide-valve 43, and more or lessclose the entrance to the air-throat 21; and this movement of saidslide-valve will cause a corresponding (and simultaneous) movement ofthe said damper 42 (as indicated by the dotted lines in Fig. 2), andcause the hot gases to hug the range or furnace top 5, as well as to bemore or less retarded in their passage toward some other part of theapparatus, there to be further utilized or discharged, no matter whatthe position of the gas-valve may be.

Suitable movable stops 60 are detachably secured to the said lip 48 ofsaid cam 47 by means of common screws or some similar fastening, to comeinto contact with the said U-shaped bearing 49 (or some common fixedpart of the stove, furnace or range) when said cam is moved to the limitof its rotation in either direction, and thereby limit the extrememovement thereof; and the adjustment of said stops to the desired pointon the peripery of said lip will permit a greater or less quantity ofgas and air to be used when the gas is turned on Or turned down to thedesired limit, and thus form a sort of measure for the least andgreatest quantity of gas and air to be used.

To permit relative adjustments of the said cam, air-valve &3, and thedamper 4:2, I provide a suitable means of adjustment of the length ofthe said air-valve or its shank 50,v

and in the present case that means consists in cutting the valve intotwo parts by a lateral severence at a point just above the location ofthe common screws 61, which are used to clamp the overlapping parts ofthe valve together such parts being united by a rabbeted-joint 62, andone of such parts being slotted, as at 63, for the purpose of permittingone part to slide upon the other part in making the valve or its shanklonger or shorter, as the best practice shall dictate, in adjusting therelative positions of the valve and the said damper; and such a joint inthe valve-connections will also be useful in taking up wear or lostmotion of the connected parts between said valve and said damper. (SeeFig. 2).

The same object may, of course, be accomplished in a measure byadjusting the said damper-rod 56 in its relation to the pin 54: of thesaid bell-crank 52, by causing said pin to rest in the desired notch 55of said damper-rod; but such adjustment cannot bemade as accurately orsatisfactorily in that manner as is desired, and hence I have providedthe slidable lap-joint 62 in the said damper &3, which may be adjustedquickly and accurately to produce an accurate adjustment of said parts.

A common lighter-tube or pipe 64 is provided with the usual lighter tip65, said pipe being connected to the said service pipe 34 and controlledby a common shut-0E cook 66.

The operation of my invention will be readily apparent from the abovedescription, and therefore need not be further explained.

I claim the following as my invention:

1. The combination with a range, stove or furnace having a top for itsfire-chamber; of a Bunsen burner; the gas-valve stem of said burner; anair-throat for said burner; means for controlling the entrance of air tosaid throat; a cam on the said gas-valve stem; means at the top of thefire-chamber for directing the hot gases toward said top and to regulatetheir passage thereat; and suitable means for simultaneously moving saidgas valve stem and said air-controlling means for the entrance of air tothe said air-throat, as well as said means at the top of the saidfire-chamber.

2. The combination in a gas and air regulating device for ranges,furnaces and stoves, of a gas-valve casting; a gas-valve; a mixing-tube;an air-entrance throat communicating with said mixing-tube; the stem ofsaid gas-valve; a cam fixed on said stem; an air-valve arranged tocontrol the passage of air into said throat; means for connecting saidcam to said air-valve, whereby the movement of said stem in turning thegas on or off will simultaneously move the said airvalve; and movablestops on said cam to limit its rotation.

In testimony whereof I have signed my name to this specification inpresence of two subscribing witnesses.

EUGENE W. VEST.

Witnesses:

FRANCES HOOVER ROSENBAUM, JOHN C. HIGDON.

